Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50  Triode  1937    CV2533 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Thyratron  1948  
 GL502A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Nixie Tube   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Rectifier FW  1930  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Quartz Crystal     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50A5  Beam Tetrode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1946  
 A4388 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50BM8  Triode Pentode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Pentode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Beam Tetrode  1951  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50CG  Photocell     3554 4GSM 50CG 868 CE1 CMG32 G8 GS146 NU.1 PJ23 R59A WL735 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50L6  Output Beam Tetrode  1941    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Output Beam Tetrode  1941  
 CV2534 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Output Beam Tetrode  1941  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50Y6GT  Rectifier FW  1940    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
50Z7G  Rectifier FW  1940    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Tetrode  1936  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
517  Rectifier MV     5557 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
 Triode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
527  Triode  1944    3300G4 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
52CG  Photocell     


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
53  Double Triode (Class B)  1936    CV2535 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
53A  Double Triode     350D4 CV2536 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
53CG  Photocell     


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
54KU  Rectifier FW     CV593 GZ32 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5458  Voltage Stabiliser     CV1069 NS1 VS69 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5459  Voltage Stabiliser     NS2 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55  Double Diode Triode  1936  UX6 
 CV2537 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5544  Thyratron     CV2210 MT5544+D3828 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5550  Ignitron  1946    BK66/5550 GL415 WL681/686 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5551A  Ignitron     BK42/5551A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5651  Voltage Stabiliser   B7G 
 CV2573 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5552A  Ignitron     BK24/5552A CV2124 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5553B  Ignitron     BK146/5553B 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5554  Ignitron     BK44/5554 CV1742 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5555  Ignitron  1961  
 BK46/5555 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5556  Triode   UX4 
 GL5556/PJ8 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5557  Thyratron (Mercury Vapour)     MT17 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5559  Thyratron (Mercury Vapour)     MT57 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5560/FG95  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5586  Magnetron (Sband Tunable)   
 CV3611 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5586A  Magnetron (Sband Tunable)   
 M5083 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850  Camera Tube (Videcon)     7038 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850F  Camera Tube (Videcon)     P844 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850N  Camera Tube (Videcon)     P849 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55850S  Camera Tube (Videcon)     8541A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5586  Magnetron (Sband Pulse)     CV3611 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875  Camera Tubes (Leddicon)     P8000 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875B  Camera Tubes (Leddicon)     P8000B 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875G  Camera Tubes (Leddicon)     P8000G 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875L  Camera Tubes (Leddicon)     P8000R 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55875R  Camera Tube     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5591  UHF Pentode  1947  B7G 
 403B 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55A/165M  Double Pentode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55B/200A  Tetrode (Power)     C1134 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55B/400A  Tetrode (Power)     C178A/5894 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
55CG  Photocell     CV405 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
56  Triode  1932  UX5 
 256 A256 C56 CV611 ER56 G56 PH256 PH56 VT56 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
56001  Diode  1960  B8A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5625  Tetrode     ARS6 CV1317 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5632/C3J  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5636  Pentode   
 CV3928 EF730 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5642  Rectifier HW  1953  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5644  Voltage Stabiliser  1961  
 CV3987 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5651  Voltage Reference Tube  1948  B7G 
 QS1209 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5651WA  Voltage Reference Tube  1948    QS1212 



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5655  Image Orthicon  1949  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5656  Double Beam Tetrode  1957  B9A 
 CK5656 CV2970 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5657  Magnetron (Sband Tunable)  1959  
 CV3958 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5663  Thyratron  1963  B7G 
 



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5671  Triode (Power)     BR189 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5672  Subminiature Output Pentode     CV2238 XFY15 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5673  Beam Tetrode   B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5675  Triode  1954  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5675A  Triode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5675LS  Triode   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5676  Subminiature Triode  1956    CV2239 XFR3 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5678  Subminiature RF Pentode     CV2254 XFR2 XFR5 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5684/C3JA  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5685/C6JA  Thyratron     


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5687  Double Triode  1956  B9A 
 5687WA 5687WB CK5687 CV2578 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5687WA  Double Triode     5687 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5691  Double Triode     CV3705 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5692  Double Triode  1948  IO 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5693  Pentode  1948  IO 
 CV3699 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
57  Pentode  1932  UX6 
 CV612 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
57.  Thyratron (Mercury Vapour)     BT5 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5702  Pentode     CV3895 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5702WA  Pentode     CV5057 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5703WA  Triode   
 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5719  Triode     CV4008 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5720  Thyratron (Mercury Vapour)     BT5 CV1147 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5722  Noise Diode  1955  B7G 
 SD1033 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5725  Pentode  1950  
 CV4011 M8196 



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5728  Thyratron (Mercury Vapour)     BT5 CV1147 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5734  MechanoElectronic Transducer  1948  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
572A  Triode     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
572B  Triode  1961  UX4 
 811A T160L 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5731  Triode     E1C 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5734  Triode Transducer  1948  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5744  Triode     CV163 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5744WA  Triode     CV163 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5749  Pentode  1951    CV4009 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
575A  Rectifier MV     AH2511 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
575A  Rectifier HW     ESU400 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5762  Triode (Power)     ACT30 BR191B CV2383 TY65000A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5762/7C24  Triode (Power)     CV2383 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5762A  Triode (Power)     CV2383 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
577  Rectifier HW   
 577WA CV3969 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5783  Voltage Stabiliser     CV3933 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5783WA  Voltage Stabiliser     CV3960 CV4066 M8190 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5784  Pentode     CV3896 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5784WA  Pentode     CV5058 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5794  Triode UHF Oscillator  1956  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5796  Thyratron     CV3706 XR11600 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
57CV  Photocell  1950    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
58  Pentode  1936  UX6 
 6D6 CV613 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5814  Double Triode     CV4016 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5814A  Double Triode  1954  B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5814WA  Double Triode     CV4032 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5820  Camera Tube (Image Orthicon)  1957  
 5820A/E P807 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5820A  Camera Tube (Image Orthicon)     5820A/E 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5820A/E  Camera Tube (Image Orthicon)     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5820A/L  Camera Tube (Image Orthicon)     5820A/E 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5822A  Ignitron  1960  
 BK168/5822A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5829  Double Diode     CV3898 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5829WA  Double Diode     CV5059 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5830  Thyratron (Mercury Vapour)     BT69 



Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5842  Triode     CV3789 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5852  Rectifier FW     CV3943 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5861  Triode     ME1001 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5866A  Triode     CV1924 RS1006B TB2.5/400 TY2125 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5867  Triode     CV1350+D2168 TY3250 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5868  Triode  1953    TY4500 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5869/AGR9950  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5870/AGR9951  Thyratron     

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5876  Triode  1964    5876A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5876A  Triode  1964  
 5876 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5879  Pentode   B9A 
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5881  Beam Tetrode  1954  IO 
 6L6WGB 6L6WGC 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5885  Double Tetrode     CK5885 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5894/C178A  Double Beam Tetrode  1955    5894A CV2797 QQV0640A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5894A  Double Beam Tetrode     5894/C178A CV2797 QQV0640A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5894B  Double Beam Tetrode  1958    CV424 QQE0640 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5895  Double Beam Tetrode     QQZ0415 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
58CV  Photocell  1951  
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
59  Pentode  1936  UX7 
 CV2538 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5906  Pentode     CV3931 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5923  Triode (Power)     BW1165 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5924  Triode (Power)     BW1165 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5932  Beam Tetrode  1952  IO 
 6L6WGA CV3899 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5948  Thyratron (Hydrogen)     CX1140 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5948A  Thyratron (Hydrogen)     CX1140 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5949  Thyratron (Hydrogen)   
 FX2519A/5949A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5949A  Thyratron (Hydrogen)     FX2519A/5949A 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5954  Camera Tube  1947    

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5956  Thyratron (Hydrogen)     FX2517 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5957  Thyratron (Hydrogen)   
 FX2517 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5957E  Thyratron   
 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5958/E40  Thyratron (Hydrogen)     FX2513 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5958/E41  Thyratron (Hydrogen)     FX2513 

Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5963  Double Triode  1954  B9A 
 CV3900 


Type  Structure  Date  Base  PDF  Sensibly equivalent^{¶} to: 
5977  Triode     CV3932 
